NBC is cleaning house. They also yanked the plug on "Law & Order", which had been on the air for 78 years now.
As for "Heroes", I never watched it. That, "Lost" and a few other shows that came around five or so years ago and took off real big ("Desperate Housewives", "House", "Grey's Whiny Anatomy", etc.). Everyone's a doctor or having something weird and freaky happen to them (they can fly, talk with ghosts, get a cell signal anywhere at a moment's notice, etc.).
At this point, I'm pretty much down to "Deadliest Catch", "Justified", "Jeopardy!", "Mythbusters" and the opening 4-5 minutes of "CSI: Miami". And I'm not 100% committed to any of
them, so...